Sample Storage Time  Cultural appearancesonMacConkey Agar Biochemical Test Inference A,B,C &D 0 day Nil nil nil A,B,C &D 2weeks Pinkish or golden (pink, orange, yellow or creamy white) small medium size colonies. Catalase-positive Coagulase-positive Staphylococcus aureus A,B,C &D 4 weeks Pinkish or golden (pink, orange, yellow or creamy white) small medium size colonies.   Gram positive spherical cocci with single or pairing cooci in short chains, non sporing, non-motile and non-capsulated. Staphylococcus aureus A,B,C&D 6 weeks Late lactose fermenters, mucoid colonies Non motile, Sugars (Glucose, Lactose, Sucrose and Manitol) Indole test negative Gram negative short rods/ bacilli Klebsiellaspp. Suspected KlebsiellaaeroginosesorKlebsiellapneumoniae

Table 5: Isolation and Identification of microorganisms from samples at 0, 2,4,6 wks of storage.